. >> president obama will be coming from washington to boston tomorrow participate in a prayer vigil. >> a picture that was sent in to aid to the aged in boston and showing what appears to be the second bomb on the sidewalk. right before it exploded. this is the one that one off 10 seconds and about a hundred yards down the course of the first bomb. it has not been released by authorities as to whether or not this second bomb was a pressure cooker device little with ball bearings and nails. we've heard from our cnn affiliate's that the pressure cooker lead on the first bomb has now been found on our roof of a building adjacent to where it exploded. this appears to show the second bomb right before it exploded. >> the bay area boy meanwhile was wounded in the blast is scheduled to go surgery today. 11 year-old aaron turnhern of martina's was near the finish line cheering on his mother who was running in the race when he caught he was caught in one of the blast. he is in stable condition in intensive care unit. back in the bay area, his grandmother says she was shocked to learn what hap